Pipeless furnace



Dec. 19, 1922.

C. M. BULLER.

PIPELESS FURNACE.

2 SHEETS-SHEET l.

FILED JUNE 23,1919- Dec. 19, 1922.

. c. M. BULLER.

PIPELESS FURNACE.

2 SHEETSSHEET 2- HLED JUNE 23, 1919.

Patented Dec. 19, 1922.

orrAnLnsr/r. suntan, or MILWAUKEE, Wisconsin, .assrcr non T0 L. J. MUELLER-I FURNACE German or MILWAUKEE, v ISCONSIN, A conroae'rron or Wis CONSIN.

rrrnLEss FURNACE.

Application filed. June 23,

To all whom/it may concern 1 Be it known that l, Crrannns M. BULLER, a citizen of the United States, and resident of lVIilw-aukee, in. the county of Milwaukee and State of Wisconsin, have invented new and useful Improvements in. Pipeless Furnaces, of which the following is a description, reference being had to the accompanying drawings which are a part of this specification. v

The present invention relates to certain new and useful improvements in furnaces of the hot air conductor type in which cold air and hot air ducts have co-incident terminals above the heater.

An. object of the presentinvention to provide a novel form of passageway leading; from the heating chamber to the hot air passageway which is formed oftwo complemem tary members each struck from a plain sheet of metal and then criinped or ribbed to pro vide upwardly and inwardly inclined reenforced walls.

Another object is to provide a furnace in which the heater is surrounded by two .chambers inter-communicable at the base, the outer one providing a cold air chamber and the second inner one providing a hotair chamber, both of the chambers having the casings defining the same opened at a pontion of their walls to provide a passageway for the heater doors, and means carried by the inner casing at" its ends adjacent the opening; therein for resilient engagement with the outer casing adjacentits ends delining the openinp therein whereby said cold air chamber and hot airchamber will be non-communicable.

A'further object of the present invention is' to provide a furnace having a heater, an outer casing, and a drum within the casing and surrounding the heater and means for vertically adjustably su} :)poitin 9,- said drum within the heater whereby the same may be readily adapted for use, with heaters of various heights and sizes.

A still further object of thepresentinvention is to provide a furnace of the type described in which the partsare readily in terchanggeable with furnaces of the same type of various sizes, and which will be simple of construction and extremely ineX- pensive to produce.

With-the above and other objects in view 1919..' Serial No. 305,982.

ceeds, my invention resides in the novel con-.

4 I teases struction, combination and arrangement of partssubstantially ashereinafter. described and more particularly defined by. the appended clanns it being understood that such changesin the precise embodiment of the.

hereindisclosed invention may be made as come within thescopeof the claims.

physical embodiment of my invention constructed according to the best model have so far devised for the, practical application of the principles thereof and in which:

F ig. l is a sectional view of a'conuylete furnace embodying my various features. said view having); parts broken away and in section to more clearly illustrate tho various details of construction, and being taken on the line l -1 of Fig. 2. y I

Fig. 2 is a transverse sectional view through my improved furnace and said view being taken on the line 2-2 of Fig. 1.

Fig. 3 is a sectional view longitudinally through the dome or double 'Iwallpi} )e and the upperend of the double wall drum and said view being; taken on the line 83 of Fig. 1.

Fig. 4 is a transverse sectional view through a portion of the double wall pipe or drum depicted in Fig. 3. said view being taken on the line 4-4 of 8.

Fig. 5 is asectional view througlra por.

heating chambezgsaid view being taken on v the line 5-5 of Fig. 2.

Fig. 6 is a sectional view through the adjustable. support for the drum said view being taken on the line 66 of Fig. 5.v

7, is a detail plan view of the supportinglink or brace for the vertical standard used in adjustably supportingthe drum.

Fig. 8 is a longitudinal sectional view throughv the intermediate front portion of the furnace depicting the novel means employed'to separate the hot air chamber from the cold air chamber at the point where the drum and the outer casing are cut to permit the passage from the heater to the furnace doors, said view being taken on the line 88 of Fig. 2.;

i Fig. 9 is a transverse view taken through which will appear as the description. pro a portion of the outer casing andthe inner drum, said vien being taken on the line $)9 of Fig. 8, and

Fig. 10 is an enlarged detail sectional view of a portion Oil?" the top ot-the inner drum to more clearly illustrate the manner of separating the two concentric casings :t'orining the drum.

As illustrated, the furnace is off well known type wherein the heater is surrounded by casings constituting two chambers one, the hot air chamber for conducting the hot air upwardly and. the other, cold air chamber for conducting the cold atmos phere downwardly communicating -with the hot air chamber at the base thereof.

Theheater may be of any well known construction and design comprising an ash pit 1, fire box. 2 combustion chamber 8 and hot air dome l separably united in a manner well known in the art and commonly pr'ac ticed.

The heater is further provided with pasor chutes 5 communicating with the V ash pit and combustion chamber whereby fresh t'uel maybe added to the heater at will and the burned out ashes readily removed. The air dome is also provided with a cleanout tubular projection 6 disposed above the chutes 5 to permit the ready access thereto for cleaning. Surrounding the heater 2 a double wall drum 7 formed of two concentric casings S and 9 retained in spaced relation by means to be later described, and provided in their walls with a passageway or'opening extending throughout the entire length thereof to permitthe passage therethrough oi'the chute and tubular projection 5 and 6. the marginal ends of the casings 8 and 9 being directed toward each other into engagement as at 10 and secured in this position by means of the U-shaped clips l 1. formed on the inner ends of partitions 12 which engage the adjacent portion oi an outer casing 13 to be de scribed.

'lhccasing l3 surrounds the entire structure and is retained in spaced relation from the drum 7 to define therebetween a cold air chamber hi to be later described, and has its wall adjacent the chute and tubular projections 5 and 6 cut away the greater portion of its length to accommodate said chute and projection. The outer ends of the chute and tubular projections 5' and 6 are closed by the usual doors, and the space surrounding the same where the casing 18 is apertured, is covered by means of a cast plate 15 which is secured to the extremities of the chute and tubular projection 5 and 6 and provides a rigid front wall portion contiguous with the outer casin The face plate supports the doors for the passages and other fittings for the various parts leading" to the furnace for cleaning or regulating purposes.

' The furnace structure is supported upon cast base 16, and the outer casing 13 has its lower end in snug engagement with. an upstanding annular flange 17 formed on said base. The casings S and 9 are retained in "their proper spaced relation by means of an upper and lower ring or hook v18 centrally provided with an annular laterally extending rib or re-eniorcing flange 19 and to the inner face of each is spot welded or otherwise seured a plurality of U-shaped member 20 haying a tongue member 21 struck from their inn r walls and adapted to receive the adjacent portion or the casing 8 therebetween. The tongue member has its lower end curved away "from the wall of the U-sliaped member 2b in order to insure the easy insert-ion of the casing 8 between the tongue 21 and the ii -shaped member 20. The space between the casings 8 and 9 provides an intermediate air chamber between the cold air chamber lat and the heating chamber 22 formed by the one casing 8 so that the air will not be heated prior to its entrance to the heating chamber by the wall of the drum 7 and thus destroy the down draft of air through the chamber l t. The space between the Cast) and 9 is left open at the top and iflliYbOIltOT the drum 7 so that a portion of the air in its passage from the chamber 14 will pass between the walls of casings 8 and i) and thence outwardly at the top thereof l join and be eo-rningleifl with the heated from the chamber 22 as it passes therenu into the double wall pipe section or e Q3 to be later described.

In ord r that the coldair chamber 14; will. not be into rpted by the chute and tubular projection. o and (-3, the partitions 152 before do-srril-d are employed. The partitions 12 luirc their outer free ends formed int-he shape mi a. V ()i' ii t0 piOYidO 21 IOSlliQllt tongue 2i which insures a snug it against the casing; wall 1?) and thus prevents the cold air from passing into the heating cham ber iii J near its top. 'l hc partitions 12 are termed of any suitable sheet metal and persit the ready removal of the drum 7 from the iiiurnace without dismantling the entire furnace. 7 i

It is particularly desirable that the lower end of the drum 7 be on a plane parallel with the top ot the asn pit of the heater, and lprovide a vertically adjustable support, capable of so with heaters of various includes a series or vertical sup porting standards having provided near their upper erds with a plurality of saw teeth 26, the standards 25 being T-shaped in cross section, and said teeth being formed ontheleg of the F. Slidably mounted upon is a plate 9/7 having an each. standard 20 opening -i3l11lll corresponding with the shape of the standard 25 and having the edge 28 surrounding the portion of the openin shaped to form a suitable lockin means as l b wardly therefrom substantially horizontal,

said hooked lug 29 receiving the lower end of the ring 18 secured to the casing 9, whereby. the drum is supported within the casing 13. When it is desired to change the adjustmentof the drum 7,-the plate 27 is moved so that its portion surrounding the stai'idard is substantially horizontal when the same will be free to move up and down the standard 25.

The standards 25 have their lower ends tapered as at 30 to be detachably engaged in the, sockets 31 formed in link members having their ends secured to the ash pit section 1 by means of fastenings 33 and to the base 16 by means of fastenings 3a. The link members 32 also serve to provide means for retaining; the base member 16, and consequently the casing 13, in the proper spaced relation withreference to the heater.

The entire furnace structure is adapted to be disposed directly under the ground floor 0t ahouse in which is mounted a suitable register plate or grating 35, and the outer casing 13 has its walls inclined upwardly and inwardly just above the heating chamber 22 and is connected with the grating plate 35 by a section 36. In order to adapt the furnace for floors of various heights, the section 36 above the inclined wall portion of the casing 13 may be varied in length in order that the proper adjustment may be had. A. cylindrical pipe section 37 also extends upwardly from the top end of the dome 23 to engage an annular fiange 38 formed on the under side of grating 35 to thus provide a passageway for conducting the heated air from the chamber 22 out through the register,

The dome 23-is of novel construction and is formed of two complementary sections 39 each formed from a single sheetot material which has been'fornied in a plain cylinder and then placed in a stamping machine and plaited or ribbed as at 4L0 whereby the walls are inclined upwardly and inwardly. The ribs 40, besides giving the shape to the sections 39, form substantially re-entorcing means for the dome as will be at once apparent. The upper smaller ends of the sections arebeaded as at etl and the portions above the beads ll directed upwardly in a straight line as at 42. The lower ends of the sections 39 are struck laterally and then downwardly as at 43 to provide-flanges for engaging the uppermostannular ring 18.

The dome 23, as before stated, consists of two of the sections 39 nested together as best-shear in F .res l and 3 whereby a stronger structure is had. having the walls thereof separated by a dead air space 44:. The dead air space d-l is provided by the bead ell of the innermost section 3 abutting the adjacent wall portion of the outermost section 39 prevcntino the walls oi. the same from engaging and the downwardly extendv i'ng flanges 43 of the sections are engaged as best shown in Fig. The top edge of the portion d2 of the outermost section 39 is preferably turned.

inwardly a slightdistance for convenience in fitting the pipe section 37.

In operation, the cold air passes through the apertures in the register plate outwardly of its central flange 38 and down through the chamber 14 thence under the bottom of the drum 7 into the heating chamher where it is heated and rises upwardly through. the dome 23, pipe section 37, and

out the openings in the register plate 35 within the flange 38. The portion of the air which passes downwardly through the chamber 14 passes between the casings 8 and 9 forming the drum 7. thus insulating the drum 7 from the chamber l t, and prevents the air in said chamber from becoming heated prior to its entrance to the heating chamber to thus insure the proper circulation through the furnace. the air passing between the casings 8 and 9 passing therefrom at the top of the drum and co-n'iingling with the heated air from chamber 22. The dead air space 44 of the drum 23 also serves to insulate the space within the drum 23 and prevents the retardation of the air circulation in the furnace by the cold air in the chamber 14 becoming heated prior to its entrance to the heating chamber 22.

Heretoft'ore. it hasbeen common practice to form the domes 23 from a blank 0% material cut so that when its ends are brought together and riveted or otherwise secured. a dome is formed provided with upwardly and inwardly inclined walls. This method is extremely wasteful in material in that to cut the blank in the desired shape, the longitudinal edges of the blank must be curvech and consequently when out from a sheet of material of a givensiz'o, the numberobtained from one sheet is greatly re duced, and the material cutaway, of absolutely no use whatsoever. Consequently, one of the main advantages obtained by my method of forming the dome 23 is that the waste of material is practically nil, and a greater number of blanks cut from a single sheet of material. As "hereinbetore described I form the domes 23 from a single blank of material of rectangular form, which may be of one piece or of several pieces secured together, having its ends secured together to form a plain cylindrical casing.

The casing thus formed is then.

plaited or ribbed to provide the inclined walls.

Another important advantage obtained by itoin'i'ing the dome by my method is that the walls thereof are greatly re-entorced means of the ribs or plaiting which serve to produce the proper inclination to the walls.

What I claim as my invention is:

i. it heating furnace, comprising an outer casing, an inner casin of less diameter than said outer casing and positioned therein with its walls spaced from the walls oii said outer casing to form an air passage. a heater within the inner casing and spaced from the walls thereof to form a heating chamber and means for vertically adjustably supporting said inner casing and holding the same in spaced relation between the fire pot and the outer casing.

A. heating furnace, comp-rising an outer casin an inner using of less diameter than said outer casing and positionec therein with its walls spaced from the walls of said outer casing to form an air passage, a heater within the inner casing and spaced from the walls thereof to form a. heating chamber and means engaging the lower edge or the inner casing for substantially readily vertically adjustably supporting the same in said outer casing.

3. A heating furnace, comprising an outer casing, an inner casing of less dianieter than said outer casing and positioned therein with its walls spaced from the walls of said outer casing to form an air passage, a heater within the inner casing and spaced from the walls thereof to form a heating chamber, and means for vertically adjustably supporting said inner casing and holding the same inspaced relation between the the pot and the outer casing, said mea s consisting oi: a vertical stamlard adjacent the lower portion of the inner casing and having teeth tor-med therein and a member having one end slidably mounted on the standard and engage able with any one of the teeth and its other end engaged with said inner casing to support the same.

4:. I A. heating turnace comprising a, heater having a tubular projection extended therefrom, an inner casing surrounding said heater and having a cut away portion to permit the passage therethrough of said heater projection, said casing being spaced from the heater to provide a heating chamber an outer casing surrounding said inner casing with its walls spaced therefrom to provide an air inlet and having a cut away portion to permit the passage therethrough of said heater projection, and partition members carried by one of said casings adjacent its cutaway portion and having their free ends normally resiliently bearing against but not attached to the adjacent wall portions oi the other casing to close the air inlet where the heater projection passes therethrough.

5. A heating iurnace of the class described comprisin a heater having passages projecting hereiiom, an outer casing surrounding said heat r and provided with an opening in its wall for the heater passages, an inner casing spaced from said outer casing and vertically adjustably positioned therein and provided with an opening in its wall for the heater passages, and partitions having their inner ends secured to the marginal edges of the opening in the inner casing and their outer ends resiliently engaging butnot attached to the wall of the outer casing adjacent the marginal edges of the opening therein to form an area-way for said heater passages.

6. A heating furnace of the class described comprising a heater having passages projecting therefrom, an outer casing surrminding said heater and provided with an opening in its wall for the heater passages, an inner casing spaced from said outer casing and provided with an opening in its wall for the heater passages and partitions having their inner ends secured to the marginal edges of the opening in the inner casing and their outer ends provided with a spring bend which resiliently engages but is not attached to the walls of the outer casing adjacent the marginal edges of the opening therein to form an area-way for said heater passages.

7. A heating furnace of the class described comprising a heater having passages projocting therefrom, an outer casing surround 'ing said heater and provided with an opening in its wall for the heater passages, a. drum within the casing and surrounding the heater and including two concentric casings of different diameters to provide an air space. therebetween said casings forming the drum having openin in their walls for the heater passages, clip members engaging the adjacent marginal edges or the openings in said drumcasings to secure said casings together at said edges, and means carried by said clip members and extending resiliently outwardly to abut but not attached thereto the wall of the outer casing near the marginal edges of its opening to provide an areaway for said heater passages.

In testimony wh erect I my signature.

CHARLES M. BULLER. 

